Sunday, September 09, 2012 - 10:47 am, by: James Tims(Timzy)
Hi guys,
It's been asked thousands of times but thought I'd ask again especially after dyno day yesterday. I want to know what you guys think is the best turbo and housing for the 1jz to get a figure between 300-350 rwkw with as minimal lag as possible since I'll be coming from the twins. Ryan yesterday managed to pull 305 rwkw at 25 psi with this one (http://www.ebay.com/itm/T4-Flange-GT35-TURBO-CHARGER-A-R-70-A-R-68-WATER-V-BAND-clamp-TURBOCHARGER-/ 260900815310?pt=Motors_Car_Truck_Parts_Accessories&hash=item3cbee681ce&vxp=mtr) however the lag would kill me!!! Was looking at a GT3582r but I'm still unsure about the whole setup etc. Any suggestions would be great and yes I'm on a budget would probably buy an ebay single haha
Sunday, September 09, 2012 - 11:54 am, by: Daniel Clarke(Dieseltrain)
Hks3037 or gt3076r will get there . 0.8 rear on both . Good manifold , some small cams 256 just to breathe better than stock up top. Or 264 if your heaps keen .
Bear in mind your factory auto will die very quickly .
Sunday, September 09, 2012 - 12:15 pm, by: James Tims(Timzy)
Yes too right you are, would need a manual conversion and those things can add up very quickly..might just call it quits at high flow steel wheel and anything more I'll just buy a supra next year sometime.
Sunday, September 09, 2012 - 02:06 pm, by: Daniel Clarke(Dieseltrain)
Seen 307rwkw @ 25 psi on a 3076r with twin exhaust inc 4 mufflers .....
They can do it . Nothing wrong with 25psi ... Tuning is important and in fact , your better off using all of a turbo , not chocking on a t04z or gt42r and running 12psi , if that makes sense .
Sunday, September 09, 2012 - 03:57 pm, by: Aaron Casey(Blownminiturbo)
25 is pretty easy with 1/2j with good condition motor and right setup. i want mine tuned to 20psi for easy reliability but all the tuners keep trying to get me to run minimum 28psi as they have many running that all day everyday for years.. (im struggling for traction untuned 16psi in 4th with semi slicks... )
Sunday, September 09, 2012 - 07:31 pm, by: Blake Gloyn(Blakenz)
the 1jz has short strong rods, so can handle high boost if tuned well. in japan, they boost unopened 1jzs with camshafts and big single turbos to 29 psi(100 plus octane fuel) and run 10.9 secs at 130mph!
Jay Asghari TryHard Victoria '94 UZZ31 GTL, '94 TT, '96 UZZ32
Sunday, September 09, 2012 - 08:04 pm, by: Jay Asghari(8pack)
That's right Tai, the EFR range is a great range to look at and purchase if keen. However as said dollars can add up quickly if looking to convert to the r154.
The ebay kits are, in the end, a cheaper compromise. If you want reliable hp, there are no shortcuts. Better yet, get a manual soarer - they are around, and cheaper, than they have ever been. Start your mods from there or move them across to the r154 tt's.
Monday, September 10, 2012 - 08:05 am, by: Daniel Clarke(Dieseltrain)
Shane's Cressida ran a gt42r from memory and a 50 shot of gas for over 4 years racing and street duties ...
Running over 130mph making over 600rwhp in a full weight roll caged street car with a mv auto box , stock 1jz engine which was sold with 152,000km on it and had over 170psi in all 6 cylinders .
Boost is not the enemy , tuning is Nuff said really.
You get. Turbo that spools early with the headroom for power using its boost , or fit a bug laggy MOFO and use 13psi of its laggy unusable pOwerband ....
Monday, September 10, 2012 - 12:59 pm, by: Ali Saeed(Ali)
I am not all that much of on expert on turbos/boost etc, but I have read that low boost on a gt35 will be less laggy than high boost on a gt30? Can someone explain/debunk this?
Monday, September 10, 2012 - 02:58 pm, by: Daniel Clarke(Dieseltrain)
Cant see how when the 30 will spool earlier , make peak boost earlier therefore make its peak torque earlier .
I'm not saying push 35psi through something limited to 20psi . But 25psi isn't going to take much longer to achieve Than 15-18 .
Alternative IMO is a high flowed ct20 from the vvti ... Hypergear have made 280rwkw from one of these and I'm sure would be responsive and boost early .
Also you want a nice fat usable torque curve ... Anyone can make 300rwkw on a dyno peak power , but down the quarter I've left a few behind due to a usable tractable powerband .
Look at Jeffs car . 16-17psi and 270rwkw . 22psi will push 300 and is a HELL fun to drive ! Such a broad powerband .
Monday, September 10, 2012 - 05:29 pm, by: Blake Gloyn(Blakenz)
forget the gt35 if you have an auto trans 2.5 litre. the gt30 with .8 rear housing is the business. Ben burgess did 320rwkw at 24 psi, and 11.4 sec. Spooled faster than stock twins.
Monday, September 10, 2012 - 05:50 pm, by: Sebastian Grant(Saabg)
We are still yet to see what a gtx3576r would do. If what Garrett say is true it will be as responsive as a gt3076r but push ~10% more air flow. That should yield the 350rwkw the op is after.
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